Extruding applicator for calking compound and the like



Jan. 17, 1956 s, c w 2,731,176

EXTRUDING APPLICATOR FOR CALKING COMPOUND AND THE LIKE Filed Jan. 4, 1952 l 54 12 I6 1 5 2a s1 17 g t! H 1 56 I I (a 10 22 I INVENTOR. SAMUEL C PEWE QMU/MWLV United States Patent EXTRUDING APPLICATOR FOR CALKING COMPOUND AND THE LIKE Samuel Crewe, East Cleveland, Gllio Application January 4, 1952, Serial No. 265,030 2 Claims. (Cl. 222-326) This invention relates to appliances for extruding plastic roofing cement, calking compound or any other extrusile substance from cartons or cartridges wherein it is prepacked, and for directing such compounds into crevices.

Conducive to a better understanding of this invention, it may be well to point out that plastic compounds for application by means of calk guns are sold not only in bulk but also in cartons or cylindrical tubes which are filled with the plastic compound at the factory. These pre-filled cartridges usually comprise a cylindrical body member having end walls with an extrusion orifice in one end and a movable wall at the other end. The filled cartridges are fitted into the barrel or otherwise attached to the so-called calk gun and do away with the time consuming and wasteful method of hand filling the gun barrel from a bulk container with a spoon, spatula or similar implement.

However, as made heretofore, such calk guns have intricate attaching means for the cartridge including specially bent wires, hinged fingers or threaded engaging means which are awkward to manipulate and easily gotten out of adjustment within a short time.

The primary object of this invention, therefore, is to provide a calk gun for cartridges which provides a rigid semi-cylindrical cradle or magazine for receiving the cartridge that is both rugged in structure and fool-proof in operation.

A further object is to provide a gun of the type stated that may be used either with metal or paper cartridges having beaded or unbeaded ends.

Still another object is to provide such a gun that is economical to manufacture and efiicient in operation, in that it is operable by one hand of the operator.

These and other objects of the invention will become apparent from a reading of the following specification and claims, together with the accompanying drawing, wherein like parts are referred to and indicated by like reference characters and wherein:

Figure l is a side elevation of the calk gun comprising this invention, partly in section, showing a cartridge cradled within the magazine;

Figure 2 is a perspective view of the gun with the cartridge removed;

Figure 3 is a front elevation of the gun and cartridge taken in the direction of the arrows 33 of the Figure 1;

Figure 4 is a side elevation of a portion of the magazine and supported cartridge showing an alternate form of headless cartridge and retaining clip;

Figure 5 is a view of the same taken in the direction of the arrows 5-5 of the Figure 4; and

Figure 6 is a side elevation of a beaded cartridge, partly in section.

As shown in the drawing, reference numeral 10 indicates the semi-cylindrically shaped magazine of the gun having a handle means 13 at the rear end therefor, includingratchet mechanism for advancing the pusher rod 21 and piston head into the supported calk cartridge 30.

I The forward end of the magazine 10 is bent upwardly and inwardly upon itself to form the rimmed flange 24, which is semi-circular in shape. The radius of the inturned rim of the flange being complementary to the crosssectional radius of the hereinafter described calk cartridge bead.

A semi-circular wire bail 25 is hingedly mounted, by means of hinges 27, crosswise of the magazine proximate the flange 24. The curvature of the bail 25 being such that it can be swung across a cartridge 30 nested in said magazine as illustrated in the Figure 1, and its free end 26 engaged with a latch 28 formed on the opposite face of the magazine as shown in the Figures 2 and 3. The diameter of the magazine 10 being slightly greater than the diameter of the cartridge to be supported, and the distance between the flange 24 and the hereinafter described seat 11 at the handle end of the magazine being slightly greater than the overall length of the cartridge body.

The ratchet mechanism may be any one of a number of well known types, but as shown comprises the structure described in my Patent No. 2,534,857 granted to me on December 19, 1950.

The ratchet mechanism consists of a handle 13, an operating lever 14, a smooth toothless pusher 21 and pawl and dog members 16 and 17 respectively. The handle 13 is made of sheet metal formed hollow with side and rear walls. The lower portions of the side walls are shaped to form a suitable grip element. The forward end of the handle member has attached thereto a semicylindrical magazine 10, also formed of sheet metal as shown in the Figure 2. Between the handle 13 and the magazine 10 there is a seat or cup 11 whose rear wall 22 forms the front wall of the handle 13. The upper portion of the rear wall of the handle is provided with a round hole 45 which is aligned with the axis of the magazine 10 and through which the toothless pusher bar 21 may move freely. The center of the seat 11 is simultaneously provided with a second hole 46 which permits free passage of the pusher bar 21 into and out of the magazine 10, a piston head 23 being mounted at the forward end of the pusher and a grip 20 being located at the extreme rear end of the pusher. An inwardly protruding bar or stop 19 is positioned on the rear wall of the handle13 above the hole 45. This handle is made smooth with rounded wall corners and without sharp edges or unnecessary projections extending therefrom.

An operating lever 14, also made of sheet metal and of substantially U-shaped, cross-section is pivotally mounted on the handle by the pivot pin 47 with the open side of the U faced toward the rear wall of the handle 13. An elongated hole 37 is located in the closed or base side of the U -shaped lever 14 just above its pivot point. The pusher 21 passes through the lever hole 37, the width and length of the hole 37 being such that it will clear the pusher 21 and the coil spring 34 which is mounted thereon, in all possible positions of the lever 14. A simple expansion spring 15 is supported between the two grip elements 13 and 14 so as to separate them as far as possible. The separated position as shown in the Figure l, is the normal position of the grip elements. The pusher bar 21 is perfectly smooth all around, having no teeth or serrations along its entire length.

Reference numeral 16 indicates a pawl having its upper half bent at an obtuse angle to the lower half, with a hole 35 located in the lower portion thereof just below the bend. The diameter of the hole 35 being slightly larger than that of the pusher 21 so that the pawl may be tilted slightly from the perpendicular when the pawl is mounted on the pusher.

A coil spring 34 mounted on the pusher normally operates to urge the pawl 16 against the upper end of the lever 14 as shown in Figure 1. Reference numeral 17 indicates a dog substantially rectangular in shape mounted on thepusher 21 by means'of a-hole 36 which'is-slightly larger in diameter than the pusher so that the dog 17 may be tilted from the perpendicular relative the pusher 21.

Asecond coil spring'4-3 'is mounted on the'pusher between the pawl 16 and the dog 17 and normallyv actstotilt the dog from' the perpendicular. A third coil spring 18 is seated between the upper end of the dog 17 'and'the rear wall of the handle 13 to further aid the spring 43' mm efforts to tilt the dog 17 from the perpendicular. To

project the pusher forward and'hold it there, the lever 14 is'moved rearwardly against the pressure of'the spring 15 to the position indicated by reference numeral 14a in the Figure 1. The action of the various described ratchet elements is fully set forth in my heretofore identified Patent No. 2,534,857 and is incorporated herein as if fully restated.

In the Figure 6 is seen a conventional calk cartridge 30'of the type having a metal bead 33 joining its front wall, containing the discharge s'pout'32, to the body of the cartridge; A movable follower 31 slidably interfits the head end of the cartridge and confines the calk material 44 therein.

In order to remove the calk compound from the cartridg'e and position it in the desired place on the structure to be sealed, a device is required, such as that just described, which is capable of exerting longitudinal pressure against the follower 31, which in turn causes the contained calk compound to be extruded through the spout 32.

The extruding applicator is used as follows:

The pusher is retracted to its full extent so that the piston head 23 is withdrawn into the seat or cup 11 and the head end of the cartridge 30 is inserted into the seat 11' of the magazine 10 and pushed rearwardly thereagainst. The length of the magazine 10 being such that the discharge end of the cartridge is then permitted to fall into'place in the magazine so that it is nested in the open semi-cylindrical magazine with its bead 33 aligned with the rimmed flange 24. The pusher and piston 23 are then moved against the follower wall 31 of the cartridge 30 by operation of the lever 14. This initial movement causes the cartridge to move against the rim of theflange 24 interlocking the bead 33 and the flange 24 against relative vertical movement. The cartridge will then be securely locked into the magazine between the flange 24 and the seat 11. Further forward movement of the pusher 21 into the cartridge causes the piston head 23 to bear against the follower 31, resulting in the extrusion of the contained calk 44 thru the spout 32. The twopoint suspension of the pusher 21 in the aligned bearing holes 46' and 45 in the seat wall 22 and the rear wall of the handle 13 respectively maintains the pusher in alignment with the longitudinal axis of the magazine It) in all positions of the advancing pusher 21- so that the cartridge is increasingly locked in place as the advancing pressure on the pusher is increased. The pressure of the advanc'- ing pusher also causes the rimmed flange 24 to grip the bead 33' with ever increasing tenacity. As a result of this action, the spout end of the cartridge is held immovable against vertical motion.

If an unbeaded cartridge such as that illustrated in the Figures 4 and is used, the wire bail 25 is used to lock the forward end of the cartridge in place.

Figures 4 and 5 illustrate an alternate form of locking means for headless cartridges wherein reference numeral 4 indicates a flexible metal clip rigidly attached to the forward end of the magazine by means of rivets 42. A pressure foot 41 is formed at the free end of the clip and the length of the clip is such that it will bear against the top of the cartridge when the cartridge is nested in the magazine 10.

An extruding applicator such as that just described is simple to operate since it is only necessary to drop the cartridge into the open semi-cylindrical magazine and put slight-pressure onthe pusher 21 to.lock:the? cartridge rigidly in place and in effect make it a mechanical unit with the extruder.

It will now be clear that there is provided a device which accomplishes the objectives heretofore set forth. While the invention has been disclosed in its preferred form, it is to be understood that the specific embodiment thereof as described andillustrated herein is not to be considered in a limited sense as there may be other forms or modifications of the inventionwhich.should"also. be construed to come within the scope of the appended claims.

I claim:

1. An extruding applicatorv for calking. compound cartridges of the type having a fixed discharge end joined to the cartridge body by abeaded joint, and provided with a spout, and a head end closed by a follower movable upon application of pressure to force compound through the spout; the said applicator comprising handle means including a semi cylindrical magazine for supporting the said cartridge, the said magazine having a seat at its near end for engaging the head end ofsaidcartridge and a semi-circular flange including an inturned rim at its far end for engaging the beaded joint at the discharge end of said cartridge, the radius of curvature of the inturned rim portion of the flange being. complementary to the cross-sectional radius of the cartridge bead so that when the cartridge is nested in the magazine the rim and the lower half of the head will interlock; a pusher movably supported by said handle means and adapted to engage the follower andadvance it into the cartridge, and manually operable mechanism operatively interconnecting said handle means and said pusher and actuatable for advancing said pusher and holding itin each position to which it is advanced.

2. An extruding applicator for calking compound cartridges of the type having a fixed discharge end joined to the cartridge body by a beaded joint, and provided with a spout, and a head end closed by a follower movable upon application of pressure to force compound through the spout; the said applicator comprising handle means including a semi-cylindrical magazine for supporting the said cartridge, the said magazine having a seat at its near end for engaging the head end of said cartridge and a semi-circular inturned flange including an inturned rim at its far end for engaging the beaded joint at the discharge end of said cartridge, the diameter of said magazine being slightly greater than the diameter of the aforesaid cartridge and the distance between the said seat and the flange rim being slightly greater than the length of the cartridge; the radius of curvature of the rimmed por' tion of the flange being complementary to the crosssectional radius of the cartridge bead so that when the cartridge is nested in the magazine the rimand the lower half of the bead will interlock; a pusher movably supported by said handle means and adapted to engage the follower and advance it into the cartridge, and manually operable mechanism. operatively interconnecting said handle means and said pusher and actuatable for advancing said pusher and holding it in each position to which it is advanced.

References Cited in the file of this patent UNITED STATES PATENTS 

